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Friday, March 3, 2017

Planet Nine: the movie

When I am not searching for Planet Nine, I am teaching classes here at Caltech and throughout the world. The most fun class is my online class The Science of the Solar System. It is a 100% free online class hosted at Coursera for anyone in the world. I've been running the class for several years now, and I finally got around to updating the class to include a short lecture on Planet Nine. For fun I thought I would post a copy here just to keep everyone up to date on my favorite yet-unseen planet. It's about 20 minutes long, and extra amusing if you watch it at double speed. CLICK HERE to watch it on Youtube,

If you enjoy this lecture, you might enjoy the whole class. Give it a try. It is, after all, entirely free.

because of planet nine effect, the sun over races the moon subsequently the moon's first (new moon) phase can not be seen, because the sun meets the moon at its first phase instead of the last phase. This explains the phenomenon of solar eclipse and new moon.

Could you please provide the mean anomaly of Planet Nine? I can't find a correct one anywhere. I found a true anomaly, and worked backwards to get the mean anomaly (with an online calculator, I'm not that good!), but it wasn't in the part of the sky you said it would be in, so I don't think the true anomaly was correct.

Thanks.

Also, what do you think of naming the planet after the Roman god of nocturnal thunder, Summanus, who is considered to be a mysterious god as well? Sounds perfect to me.

If Planet 9 originally formed around another star in the same star formation area, wouldn't the original cloud have nearly the same composition everywhere? So would Planet 9 be close in composition to the planets of the Solar System, or could it still be different since the star's mass and the system's angular momentum would likely be quite different?

Thank you very much! I took your course in 2015, finished it and was waiting for any updates about your new discovery. It's a wonderful feeling to see one's professor (even if it's a MOOC) on the news :)

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